The use of drones, or unmanned aerial vehicles (UAVs), in war and counter-terrorism operations remains a highly controversial issue both domestically and abroad. A recent string of events, however—including a leaked Justice Department document, the discovery of a secret drone base in Saudi Arabia, and the Obama administration's admission that it has killed four American citizens in drone strikes—has kept the issue at the forefront. As the debate over the ethics and constitutionality of drone warfare takes center stage, Brookings experts examine the legal and political implications of drone technology.